Half to samuel p



(No Model.)

J. H. DATES. INDIGATOR LOCK.

No. 564,185. Patented July 21, 1896.-

if 0 (kW WAX/mm: MW:

UNITED STATES JOHN H. DATES, or PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO SAMUEL P. PARKE, OF SAME PLACE.

iNDICATOR-LOC K.

SPECIFICATION forming part of Letters Patent-No. 564,185, dated July 21,1896.

Application filed May 1, 1896. Serial No. 589,836. (No model.)

T 0 a whom it may concern.-

Be it known that I, JOHN H. DATES, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Indicator-Locks, of which the followin g is a specification.

My invention has relation to a lock for application to sundry articlesfor locking the same, as well as readily determining tampering orunauthorized access to the article to which applied by the relocking ofthe same 5 and in such connection it relates particularly to theconstruction and arrangement of an indicator-lock for cash-registers,post-office boxes, money-chests, or other similar articles.

The principal object of my invention is to provide a simple, durable,effective, and reliable indicator-lock for application to articles toindicate by means of numerals the looking of the same and to readilydetermine if any tampering with the interior of the article orunauthorized relocking has been resorted to by change of exposednumerals and the counters or indicators actuated by the key of the lockwhich secures the members of the article.

Myinvention, stated in general terms, consists of an indicator-lockconstructed and arranged in substantially the manner hereinafterdescribed and claimed.

The nature and characteristic features of my invention will be morefully understood from the following description, taken in connectionwith the accompanying drawings, forming part hereof, and in which--Figure 1 is a front elevation of an indi cator-lock embodying thefeatures of my invention, and Fig. 2 is a rear elevational view of thesame.

Referring to the drawings, A is the frame or face-plate of the lock,provided with corner openings or for securing the same to an article,and provided with openings or windows a and a located adjacent to eachother in said plate A, and through which are exposed numerals, asclearly illustrated in Fig. 1 of the drawings.

13 is the lock, of any suitable construction,

incased, as shown, and with a keyway 1) extending through the face ofthe case b of the lock, and having a lock-bolt b adapted to bemanipulated by a skeleton or other form of key.

To the rear of the frame or plate A of the lock is pivotally mounted tworatcheted wheels 0 and 0, provided on one of their respective faces withnumerals or disks 0 and 0 having numerals printed or otherwise appliedthereto. These disks are secured to the wheels 0 and c, and are adaptedto be revolved therewith in a manner to be presently explained.

D is a lever provided with two downwardlyprojecting pawls d and d, andthis lever is pivoted at one end to the frame or plate A, and at itsother end is formed an eye d for engaging one end of a coiled spring 6,the other end of which is connected through an eye c with a lever E,provided with two upwardly-projecting pawls e and e the lower angularend of said lever E being secured to the lock-bolt 11 as clearly shownin Fig. 2, wherein is also illustrated in full and dotted lines thelocked and unlocked positions of the device and the indicator mechanismthereof.

The teeth of the ratchet-wheel c, which carries the dial whereon isplaced the numerals indicating tens, are all cut to an equal depth, andthe teeth of ratchet-wheel c are likewise cut to equal depth with theexception of a tooth 0 which is cut deeper into the wheel. This deepertooth c is diametrically opposite to that portion of disk 0 whereon thenumeral O is placed. By the arrangement of the pawls carried by levers Dand E and the arrangement of the teeth of the wheels 0 c the lock-bolt bmay be shifted nine times without the pawl of lever E operating the disk0. This is so for the following reason: When the bolt 19 is shifted intolocking position, the lever E is drawn to the left, operating throughits pawl e and a shallow tooth of the ratchet-wheel c the disk 0 onespace. The movement of the bolt slightly lowers the lever E to aposition indicated in dotted lines in Fig. 2, in which position the pawle is not in engagement with the teeth of ratchet c, and consequently thedisk 0"" thereof cannot be rotated. \Vhen, however, the pawl e of leverE comes into engagement with the deep tooth a, the sprint, (3 will drawthe lever E upward until the pawl e" is in engagement with the teeth ofwheel a", and thereupon the next move ment of lock-bolt will advanceboth wheels and likewise each disk one space.

From the above description it will be apparent that the number of timesthe lockbolt is turned by the key of the lock or otherwise will beindicated continuously by the disks 0 and a", and that tampering withthe lock can therefore be easily detected.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. An indieatorloek comprising a frame or plate provided with openingsand. with a lock adapted to be manipulated by a key, 1W0 ratehetedwheels two pawl-levers, one of said levers pivoted to said frame orplate and the other secured to the lock, and said levers connected with.each other by means of a spring, substantially as and for the purposes 1described.

2. An indicator-lock, comprising a frame or plate having openings orwindows to pose numerals and carrying an ineased lock operated by a key,two ratchet-wheels carrying disks provided with numerals, said wheelspivotally connected with the rear of said frame or plate, two leversprovided with op positely-disposed pawls, whereof one lever is pivotedat its lower end to said frame or plate and whereof the other having anangular lower extension is secured to said lock and said levers at theirupper ends connected with each. other by means of a spring,substantially as and for the purposes described.

In testimony whereof I have hereunto set my signature in the presenceof? two subseribin witnesses.

JOHN ll. 'DA'll'lS.

\Vitnesses:

J. WALTER DoUcLAss, 'luoMAs M. SMrru.

